US60983A - Anthony wrealsh and william burns - Google Patents

Description

@mitch tartes stwt @fitta t ANTHONY WREALSH AND WILLIAM BURNS, or sPRiNerin-LD, omo.

Letters Patent No. 60,983, dated January 1, 1867.

IMPROVEMENT IN WATER-WHEELS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, ANTHONY WREALSH and WILLIAM BURNS, of Springfield, in the county of Clark, and State of .,hio, have invented a new and useful Improvement in Water-Vlheelsz and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making part of this specification, in which- Figure 1 is a perspective view of the casin g.

Figure 2 is a vertical section.

Figure 3 is a horizontal section on the lins :r cv, iig. 2; and

Figure 4 is a similar section on the line y y, g. 2. I

Figure 5 is a similar section on the line e z, iig. 2.

Figure 6 is a perspective View of a section of the wheel.

We have used the same letters in all the gures in the indication ci' the same parts. v

Our improvements are made upon the wheel known as the Jouval Turbine, to the construction of which we makegeneral reference as indicating the construction of such portions of the wheel as may not be herein specically set forth.`

It is well known that that wheel is one with curved buckets setting radially upon a longitudinal hub through which passes the shaft to which it is fastened, the water being discharged vertically, and received from directly above the Wheel through guides having an inclination the reverse of that'of the buckets of vthe wheel. These guide plates are cast also radially, between a central hub and an external cylindrical shell, the whole of which we shall call the guide-wheel. The buckets of the wheel run within a cylindrical casing supporting the bridge- 1 tree, upon which rests the shaft. This casing and that of 'the guide-wheel are of the same diameter, and the two are bolted together through opposed flanges projecting from the top of one and the bottom of the other.

Such being the ordinary form of the Jouval wheel, our improvements consist in regulating the admission of water by the combined action of a stationary plate resting upon the guide-wheel, and a revolving gate resting thereupon. Also, in the form of the openings through the gates. Also, in supporting the bush through which passes the shaft uponbraces resting upon the crown ofthe intermediate plate, which braces also, in combination with the crown of the intermediate plate, form a hub upon which the gates turn. Also, in forming a bearing for the shaft in the apex of thecrown of the intermediate plate. Also, in the construction of the buckets of the wheel. i v

l The following description will enable a person skilled in the arts to apply our improvements in the construction of a Jouval Turbine.

A is the shaft, which is intended to stand vertically, being surrounded by the water in the fore-bay which covers the Wheel. The shaft rests upon the bridge-treeB which is'attached to the inside of the cylinder C, below the wheel. D is the wheel, tothe hub of which the radial buckets are attached. In the Jouval Turbine these buckets are upon the same plane, and are subject to the disadvantage that while the water strikes upon the buckets at a uniform velocity, the outer edges of the buckets travelling-upon a circle of greater radius, move much faster than the inner edge of the buckets describing a smaller circle. n consequence of this dierence in velocity, the extremities of the buckets do not yield as great a percentage of power as the middle section, for-the proper velocity of which under a given head the diameter of the wheel is determined, the outer section moving too fast, and the inner section too slow. The point of greatest contraction of the buckets is at their points, which is the point of maximum pressure. Owing to the diierence in velocity of the sections as mentioned, one .section discharged its water too soon, the other too late, and the larger the Wheel the greater is the loss of power from this source, for the discrepancy is proportionally increased. To avoid this diilculty we do not make the face of the bucket upon the saine plane as formed by identical radiivextending across the face of the bucket,

v`but by a combination of two or more planes, parallel with one another, as shown in the'drawings. The part d would-discharge thc water first, as its point is set forward of the point of the part d, but as these sections are travelling at different velocities, the difference in the length of their buckets compensates for this, and the water received at the saine time will be simultaneously' discharged, so that the continued llow of the current is not disturbed and the general effective act-ion of the wheel improved. We make the .sections UZ cZ of the same width; we also vary tho proportions of the bucket, as stated in the formula for the Jouval wheel given by Weishack, in his werk on mechanics. We make the buckets of the width of one-third of the radius of the wheel,

and the ldepth from top to bottom one-third of the entire diameter of the wheel, and the distance between the planes we make onefhalf thel entire width of the bucket `when made in two planes, and one-third if-.made in three, and so on in like'proportions. -E is the guide-wheel, composed of two cylindrical rings, E', and intermediate guides, EQvforrncd as in the ,louve-l Turbine. The flange E, projecting from the bottoni of the outer cylindrical ring, isbo'lted toacorrespondin'g iizinge, C', projecting from the upper edge of the cylinder'v C, the two forming a tight continuous cylindrical casing for the Iguides and wheel. The plate F rests upon the guidewheel; it has openings corresponding in number with .the guides; the sides of' these openings are formed on radial lines, and the area .of each is a little less than half that of the top ofthe guide; the plate is so set 'on the guide that, while the opening is directlyT- over the guide opening, the edge of the plate at the opening shall nearly correspond (or entirely so) with the edge of the upturned face of the guide opening, the solid 'part of the plate extending over 'the portion of the guide towards which it curves. The centre of the plate, within the gate ring, is raised and turned to a true circle corresponding with the 4inner face of the ring at H. The centre of this hub fits snugly to the shaf A lip, F/formed on the intermediate plate, sustains the box F, which cncloses the spur-wheel I, the shaft I turning, which rises through the box. This spur-wheel gears into cofre C I', projecting from' the. exterior face of the gate ring H, and is used to turnthe gates on the intermediate plate F. The gates are formed by a ring resting on the intermediate plate. The openings correspond with those of the plate F, and the solid parts H, with' the solid parts of the plate between the openings. The internal ring H' turns without 'the central raised hub of the plate F, which retains it in pla-ce. Slight projections are formed on the inside of ring H', which, striking against the feet of the braces G", limit the movement ofthe gates in each direction so that they shall bepermitted to move far'enough to entirely cover or entirely open the orifices through the plate F, and no more. The gates should turn in such direction that they will admit the water on the side of the opening immediately adjoining the face of guide. Both sides of the bars Hl are bevelled from the centre to the lower edge, and the opposed faces of the rings and H areA` similarly bevelled, and the gate ring should be of suoient thickness to form thus funnel-formed'openings into each of the guides. The bush Gr is 'constructed with wooden followers, G', regulated by set-screws,- G, enclosing on three sides the shaft A, The bush is elevated upon the three braces G", which are fastened to the crown of the intermediate plate; thus forming an. elevated lbearing for the lower section of the main driving-shaft, and more perfectly securingits alignment than is done-when thebearing is nearer the wheel.A

We do not-limit our claim to the precise form of bucket here presented, for -the same eifect would to some 'extent be produced by making two concentric sets of buckets, separated by an intermediate cylinder,"if the buckets were arranged in relation to one another as are the parts d and d. This we regard as an inferior arrangement.

What we claim as our invention, and desire to secure by Letters Patent, isn 1 1. The buckets D, when constructed with two or more faces d and d', upon diiferent radial planes, substantially as set fr-th.

2. Constructing the inner set of concentric buckets, or faces of the same bucket al and d', shorter than the outer set, substantially as and for the purpose set forth.

3. The combination of the guide-wheel E, intermediate plate F, and gate ring H, when constructed and arranged substantially as set forth. 4 l 4. The raised crown of the intermediate: pl'ate F, as arranged in relation to and serving as a bearing for the guide ring H, substantially as set forth.

5. The `plate F, when constructed and arra ged between-the guide-wheel E and gate H, substantially as and for the purpose set forth.

6. The elevated bush G, supported' upon braces resting upon the crown of the intermediate plate F, and within the guide ring H, substantially-as and for the purpose set forth.

In testimony whereof they have signed their names to this specification in the presence of two subscribing witnesses,

ANTHONY WREALSH, WILLIAM BURNS.

Witnesses:

A. P. LINN COCHRAN, WILLIAM BLAKENEY.

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